Circulation patterns in the lower Arctic Ocean derived from geochemical data

Ikeda Motoyoshi; Tanaka Shinichi S.; Watanabe Yutaka

タイトル	en Circulation patterns in the lower Arctic Ocean derived from geochemical data
作成者	en Ikeda, Motoyoshi NRID 1000050261227 en Tanaka, Shinichi S. en Watanabe, Yutaka NRID 1000090333640
アクセス権	open access
権利情報	en The final publication is available at Springer via http://dx.doi.org/10.1007/s10872-018-0472-2 http://creativecommons.org/licenses/by/4.0/ en Creative Commons Attribution 4.0 International
主題	Other en Arctic Ocean Other en Ocean circulation Other en Arctic-Atlantic water exchange Other en Geochemical data Other en Geochemical conservative tracer
内容注記	Abstract en Climatological water-mass structures were identified in the Arctic Ocean using the geochemical dataset in the Hydrochemical Atlas of the Arctic Ocean (HAAC) as well as data on a geochemically conserved parameter, PO4, based on phosphate and dissolved oxygen. In the upper ocean above a depth of 500m, the HAAC was found to reliably depict the boundary between Pacific-Origin Water (P-Water) and Atlantic-Origin Water (A-Water), which is aligned 135 degrees E-45 degrees W near the surface but rotates counterclockwise with depth. Thus, the Arctic and Atlantic oceans exchange high-silicate P-Water and low-silicate A-Water. The PO4 field in the lower ocean below a depth of 1500m was analyzed statistically, and the results indicated that the Eurasian Basin receives low-PO4* Nordic Seas Deep Water, which flows along the bottom from the Greenland Sea. The routes from the upper ocean to the lower ocean were determined. Only the southern portion of the Canada Basin, which receives water from the Chukchi and Beaufort Seas, has high PO4* levels; the rest of the Amerasian Basin receives low-PO4* water from the Laptev Sea and/or the Barents Sea. The Eurasian Basin receives moderate levels of PO4* from the Fram Strait and from the intermediate layer. The intermediate-layer water gradually travels up from the lower ocean and returns to the Atlantic, entraining the subsurface portion. It is likely that high-PO4* water occasionally flows down from the upper ocean along Greenland, making the Eurasian Basin heterogeneous.
出版者	en Springer
日付	Issued2018-10
言語	eng
資源タイプ	journal article
出版タイプ	VoR
資源識別子	HDL http://hdl.handle.net/2115/71647
関連	isIdenticalTo DOI https://doi.org/10.1007/s10872-018-0472-2
収録誌情報	PISSN 0916-8370 en Journal of oceanography 巻74 号5 開始ページ453 終了ページ470
ファイル	fulltext Ikeda2018_Article_CirculationPatternsInTheLowerA.pdf 4.0 MB (application/pdf) Issued2018-10
コンテンツ更新日時	2023-07-26